Identifying Types of Chemical Reactions

This video tutorial covers the basics of chemical reactions, including key terms like reactants, products, and coefficients. It explains skeleton equations and the importance of balancing them according to the law of conservation of mass. The tutorial introduces five types of chemical reactions: synthesis, decomposition, single replacement, double replacement, and combustion. Each type is explained with examples, and the video concludes with practice exercises to identify reaction types.

What do coefficients in a chemical equation represent?

• The type of reaction

• The speed of the reaction

• The number of molecules or atoms involved in the reaction

• The temperature at which the reaction occurs

In a chemical equation, what do the reactants represent?

• The substances that are produced

• The substances that are consumed

• The catalysts used

• The by-products of the reaction

What is a skeleton equation?

• A chemical equation written in words

• A chemical equation with only coefficients

• An unbalanced chemical equation showing only the reactants and products

• A balanced chemical equation

Why is it important to balance chemical equations?

• To make the equation look neat

• To increase the yield of products

• To follow the law of conservation of mass

• To ensure the reaction occurs faster

Tags

NGSS.HS-PS1-7

Which type of reaction involves multiple reactants forming a single product?

• Combustion

• Decomposition

• Single replacement

• Synthesis

What is a decomposition reaction?

• A reaction where a single reactant breaks down into multiple products

• A reaction where two elements combine to form a compound

• A reaction where one element replaces another in a compound

• A reaction involving oxygen and producing CO2 and H2O

In a single replacement reaction, what is always present on both sides of the equation?

• A compound and a molecule of oxygen

• A single element and a compound

• Two compounds

• Two elements

What is the clue for identifying a double replacement reaction?

• Presence of a hydrocarbon

• One reactant and multiple products

• Two compounds on both sides of the equation

• A single element and a compound on both sides

What is always involved in a combustion reaction?

• A single element

• A hydrocarbon and oxygen

• Two compounds

• A metal and a nonmetal

Which of the following is an example of a synthesis reaction?

• CH4 + 2 O2 → CO2 + 2 H2O

• 2 H2 + O2 → 2 H2O

• Zn + 2 HCl → ZnCl2 + H2

• 2 H2O → 2 H2 + O2